Q6.2. Why does the user hear the “toot toot” sound first when taking the phone off the hook before hearing the normal dialing tone?

Q6.3. Why does the user always hear the prompt that”The number you dialed cannot be reached now, please leave the message after the tone” when calling a specific extension?

Q6.4. Why does the callback function fail when press the “RD” button on the phone directly (the screen displays “unfound”)?

Q6.5. Why do the inbound calls of a certain trunk would be hung up during a specific time period?

Q6.6. The extensions fail to make outbound calls or receive inbound calls. The admin logs in the Web Configuration Panel to check the problem, but the screen shows “502 Bad gateway”. After rebooting, everything goes OK, but the above problem repeats again a while later. What’s wrong?

Q6.7. Why the phone screen displays “unknown” instead of Caller ID when the caller calls through the analog trunk?

Q6.8. Why is the analog trunk always in busy status even when there is no call?

Q6.9. Why can I make outbound calls but cannot receive inbound calls through my analog trunk?

Q6.10. Why can I make outbound calls but cannot receive inbound calls through my SIP trunk?

Q6.11. Why does the user always hear the ring back tone when call in through analog trunk but the internal extension has no response?

Q6.12. What’s the application of MyPBX Callback feature and how to configure it?